This document discusses a study on the use of WhatsApp to support teaching and learning in higher education from the perspectives of lecturers. It presents findings from three case studies where WhatsApp was used in different ways. In Case Study 1, WhatsApp supported a blended learning model and helped build community. In Case Study 2, it facilitated student-led discussions. In Case Study 3, it aided long-distance communication. Overall, WhatsApp functioned as a boundary object, allowing identification, coordination, reflection and transformation across boundaries. However, issues around privacy, ground rules and ethics need consideration.